128228538979 has 8 divisors (see below), whose sum is σ = 129216014928. Its totient is φ = 127241194080.

The previous prime is 128228538947. The next prime is 128228539001. The reversal of 128228538979 is 979835822821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128228538979 - 2⁵ = 128228538947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128228538979.

It is not an unprimeable number, because it can be changed into a prime (128228838979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3017709 + ... + 3059905.

It is an arithmetic number, because the mean of its divisors is an integer number (16152001866).

Almost surely, 2^128228538979 is an apocalyptic number.

128228538979 is a deficient number, since it is larger than the sum of its proper divisors (987475949).

128228538979 is a wasteful number, since it uses less digits than its factorization.

128228538979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65525.

The product of its digits is 34836480, while the sum is 64.

The spelling of 128228538979 in words is "one hundred twenty-eight billion, two hundred twenty-eight million, five hundred thirty-eight thousand, nine hundred seventy-nine".